BACKGROUND
Technical Field
[0001] The present disclosure relates to a vehicle surroundings display device.
Related Art
[0002] Japanese Patent Application Laid-Open (
JP-A) No. 2008-148059 (Patent Document 1) discloses technology in which a composite image encompassing
the entire periphery of a vehicle is generated from images of the surroundings of
the vehicle captured by plural cameras. An operation lever in the form of a joystick,
a confirmation switch, and a return switch are employed so as to enable a camera position,
a camera view angle, a camera line of sight direction, and a camera viewpoint of a
displayed image to be modified in order to a display a displayed image corresponding
to a desired camera position.
[0003] Specifically, in a state prior to the confirmation switch being operated so as to
be switched ON, tilting the operation lever toward the left side or the right side
moves the camera position counterclockwise or clockwise about a circumferential direction
of the vehicle, and tilting the operation lever toward the front side or the rear
side modifies the camera view angle toward either a telescopic view or wider angle.
When the confirmation switch is operated so as to be switched ON and the camera position
and the camera view angle are confirmed, the camera line of sight direction and camera
viewpoint are modified according to the operation of the operation lever.
[0004] Plural regions forming blind spots from the perspective of an occupant and regions
that cannot be viewed without the occupant twisting their head around (these regions
being referred to as restricted view regions hereafter) are present in the environs
of a vehicle. Thus, plural optical mirrors, for example outer mirrors such as left
and right door mirrors and an inner rear view mirror that reflect different restricted
view regions to each other have hitherto been installed in vehicles. These optical
mirrors enable the occupant to view the situation in the respective restricted view
regions while still facing the front. Moreover, left and right outer mirrors are generally
configured as electric mirrors since the mirror orientation would otherwise be difficult
to adjust while traveling. This enables the mirror orientation to be adjusted remotely
by the occupant. An operation section of an electric optical mirror device includes
a four-way switch to instruct movement of the mirror orientation in four separate
directions, these being upward, downward, left, and right directions, and a selection
switch to select a mirror as a target for adjustment using the four-way switch.
[0005] In recent years, in place of optical mirrors such as described above, as in Patent
Document 1, for example, so-called electronic mirrors have been proposed in which
a camera captures images of the environs of a vehicle, and an image representing the
environs of the vehicle is displayed on a display section. However, mirrors that assist
viewing of a restricted view region are safety components, and if an operation interface
of an electronic mirror differs greatly from the operation interfaces of an existing
electric optical mirror device, an occupant accustomed to the operation of the existing
electric optical mirror device might feel some uncertainty, leading to an undesirable
reduction in ease of operation. Moreover, in cases in which an electronic mirror or
an electric optical mirror device are selectively installed in vehicles of the same
model, if the configurations of operation sections of the electronic mirror and the
electric optical mirror device are different from each other, for example having different
numbers of switches, this leads to an undesirable increase in costs and so on.
[0006] By contrast, in the technology of Patent Document 1, a single image is displayed,
and a camera position, a camera view angle, and so on of this single image are adjustable.
In order to act as a substitute for existing optical mirrors, plural restricted view
regions need to be simultaneously displayed as plural images. In cases in which the
technology of Patent Document 1 is applied in a mode in which plural images are simultaneously
displayed, the need arises to add switches and so on to the operation section in order
to select a target image. Moreover, in the technology of Patent Document 1, in a state
prior to the confirmation switch being operated so as to be switched ON, the camera
position or the camera view angle is modified corresponding to whether the operation
lever is being tilted left or right or tilted up or down. A further issue arises in
the respect that the operation interface greatly differs from the operation interfaces
of existing electric optical mirror devices in which the mirror orientation is moved
in four directions (up, down, left, and right) when the four-way switch is operated.
SUMMARY
[0007] In consideration of the above circumstances, an object of the present disclosure
is to obtain a vehicle surroundings display device capable of suppressing the difference
in configuration of an operation section and the difference in an operation interface
in comparison to those of an existing electric optical mirror device.
[0008] A vehicle surroundings display device according to a first aspect includes plural
imaging sections that each image a different region in surroundings of a vehicle,
at least one display section that displays plural images captured by the imaging sections,
an operation section including a first operation section enabling input of an operation
to instruct a movement direction of a range to display as an image on the display
section, and a second operation section enabling input of an operation to designate
a target image out of the plural images, and a display controller that is configured
to switch between a mode in which an image display on the display section is modified
under a first operation condition in which the first operation section has been operated
in a state in which the target image has not been designated using the second operation
section, and a mode in which an image display on the display section is modified under
a second operation condition in which the first operation section has been operated
in a state in which the target image has been designated using the second operation
section.
[0009] In the first aspect, different regions in the surroundings of the vehicle are imaged
by the plural imaging sections, and the plural images captured by the imaging section
are displayed on the at least one display section. The operation section includes
the first operation section enabling input of an operation to instruct a movement
direction of a range to display as an image on the display section, and the second
operation section enabling input of an operation to designate a target image out of
the plural images. There is accordingly essentially no difference to existing electric
optical mirror devices in terms of the configuration of the operation section.
[0010] The display controller is configured to switch between the mode in which image display
on the display section is modified under the first operation condition in which the
first operation section has been operated in a state in which the target image has
not been designated using the second operation section, and the mode in which image
display on the display section is modified under the second operation condition in
which the first operation section has been operated in a state in which the target
image has been designated using the second operation section. In existing electric
optical mirror devices, processing to adjust the orientation of a mirror is performed
in a manner corresponding to the second operation condition, and there is no processing
allocated to the first operation condition. This is exploited in the first aspect
in which image display on the display section is modified under both the first operation
condition and the second operation condition, and the modes by which image display
on the display section is modified are switched between the first operation condition
and the second operation condition.
[0011] Thus, difference from the operation interface of an existing electric optical mirror
device is suppressed. This suppresses any reservation felt by an occupant accustomed
to the operation of the existing electric optical mirror device. The first aspect
thereby enables difference from the configuration of an operation section and difference
from an operation interface of an existing electric optical mirror device to be suppressed.
[0012] The first aspect may be configured as in a second aspect for example, such that under
the first operation condition, the display controller modifies respective view angles
of the plural images displayed on the display section. Processing to modify the view
angles of the images displayed on the display section is processing that is not performed
in existing electric optical mirror devices. In the second aspect, the processing
to modify the view angle is allocated to the first operation condition to which processing
is not allocated in existing electric optical mirror devices. This enables the difference
from the operation interface of an existing electric optical mirror device to be further
reduced, and enables any reservation felt by an occupant accustomed the operation
of the existing electric optical mirror device to be further suppressed.
[0013] The first aspect or the second aspect may be configured as in a third aspect for
example, such that under the second operation condition, the display controller moves
a display range of the target image designated using the second operation section
on the display section in a direction corresponding to operation of the first operation
section. In existing electric optical mirror devices, processing to adjust the orientation
of a mirror is performed in a manner corresponding to the second operation condition.
In the third aspect, processing to move the display range of the image on the display
section, this being similar to the processing to adjust the orientation of a mirror,
is allocated to the second operation condition. This enables the difference from the
operation interface of an existing electric optical mirror device to be further reduced,
and enables any reservation felt by an occupant accustomed to the operation of the
existing electric optical mirror device to be further suppressed.
[0014] The second aspect may be configured as in a fourth aspect for example, such that
the display controller modifies the view angle between a first view angle that is
a standard view angle, and a second view angle that is a wider angle than the first
view angle.
[0015] The fourth aspect may be configured as in a fifth aspect for example, such that,
in cases in which the first operation section is operated again or the second operation
section has been operated in a state in which an image is being displayed on the display
section at the second view angle, the display controller modifies the view angle of
the image to the first view angle.
[0016] The fourth aspect may be configured as in a sixth aspect for example, such that,
in cases in which a vehicle speed of the vehicle is a predetermined value or greater
in a state in which an image is being displayed on the display section at the second
view angle, the display controller modifies the view angle of the image to the first
view angle. When the image displayed on the display section is modified from the second
view angle to the first view angle, the size of an image region of the image displayed
on the display section corresponding to an object present in the environs of the vehicle
is increased. An occupant therefore more easily recognizes the presence of these objects
during vehicle travel. This enables safety during vehicle travel to be improved by
modifying from the second view angle to the first view angle in cases in which the
vehicle speed of the vehicle is the predetermined value or greater.
[0017] Any one of the fourth to the sixth aspect may be configured as in a seventh aspect
for example, such that, in a state in which an image is being displayed on the display
section at the first view angle, the display controller stores a display range for
displaying images on the display section in a storage section, and in cases in which
the view angle of an image is modified to the first view angle from a state in which
the image is being displayed on the display section at the second view angle, the
display controller displays an image on the display section corresponding to the display
range stored in the storage section.
[0018] Thus, in cases in which the view angle of the image displayed on the display section
is modified from the second view angle to the first view angle, an image in the same
display range as an image previously displayed at the first view angle is displayed
on the display section. This reduces the likelihood of needing to adjust the display
range of the image displayed on the display section at the first view angle when modifying
from the second view angle to the first view angle, thereby enabling ease of operation
to be improved.
[0019] Any one of the first to the seventh aspect may be configured as in an eighth aspect
for example, such that the vehicle surroundings display device is an electronic outer
mirror device installed in the vehicle.
[0020] The present disclosure has an advantageous effect of enabling difference in configuration
of an operation section and the difference in an operation interface in comparison
to those of an existing electric optical mirror device to be suppressed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Exemplary embodiments of the present disclosure will be described in detail based
on the following figures, wherein:
Fig. 1 is a block diagram illustrating a schematic configuration of an onboard system
including an electronic outer mirror device according to an exemplary embodiment;
Fig. 2 is a perspective view illustrating layout positions of cameras and monitors
of an electronic outer mirror device;
Fig. 3 is a plan view illustrating operation keys provided to an operation section;
Fig. 4 is a flowchart illustrating surroundings image display processing executed
by an electronic mirror ECU;
Fig. 5 is an illustration of an example of a wide angle image displayed on a monitor;
Fig. 6 is an illustration of a cropping range from a wide angle image superimposed
on the wide angle image; and
Fig. 7 is an illustration of an example of a standard view angle image for display
on a monitor, in which the cropping range illustrated in Fig. 6 has been cropped from
the wide angle image.
DETAILED DESCRIPTION
[0022] Detailed explanation follows regarding an example of an exemplary embodiment of the
present disclosure, with reference to the drawings. As illustrated in Fig. 1, an onboard
system 46 includes a bus 48. Plural electronic control units, which perform different
control to each other, and plural sensor units are each connected to the bus 48. Note
that only parts of the onboard system 46 that are relevant to the present disclosure
are illustrated in Fig. 1. Each of the electronic control units is a control unit
including a CPU, memory, and a non-volatile storage section, and is hereafter referred
to as an ECU. An electronic mirror ECU 34 is included among the plural ECUs connected
to the bus 48. A vehicle speed sensor 50 is included in the plural sensor units connected
to the bus 48.
[0023] A rear-left facing camera 12, a rear-right facing camera 14, a camera stowing actuator
(ACT) 16, a left monitor 18, a right monitor 20, and an operation section 22 (an operation
interface) are each connected to the electronic mirror ECU 34. The electronic mirror
ECU 34, the rear-left facing camera 12, the rear-right facing camera 14, the camera
stowing ACT 16, the left monitor 18, the right monitor 20, and the operation section
22 collectively configure an electronic outer mirror device 10. The electronic outer
mirror device 10 is an example of a vehicle surroundings display device. In the electronic
outer mirror device 10, the rear-left facing camera 12 and the rear-right facing camera
14 are an example of plural imaging sections, the left monitor 18 and the right monitor
20 are an example of a display section, the operation section 22 is an example of
an operation section, and the electronic mirror ECU 34 is an example of a display
controller.
[0024] As illustrated in Fig. 2, a base portion of a substantially rectangular block shaped
camera support body 54L is attached to a vehicle front side end portion of a vehicle
vertical direction intermediate section of a left side door (front side door, not
illustrated in the drawings) of a vehicle, such that a circular arc shaped leading
end portion of the camera support body 54L projects toward the vehicle outer side.
The rear-left facing camera 12 is attached near to the leading end portion of the
camera support body 54L. An imaging optical axis (lens) of the rear-left facing camera
12 is directed toward the rear-left of the vehicle, and captures images at the rear-left
of the vehicle. The camera support body 54L is capable of swinging in the vehicle
front-rear direction under drive force of the camera stowing ACT 16 so as to be swung
to a stowed position where the length direction of the camera support body 54L substantially
follows an outer side face of the vehicle, or to a deployed position where the rear-left
facing camera 12 captures images at the rear-left of the vehicle.
[0025] A base portion of a camera support body 54R, which has a profile with left-right
symmetry to the camera support body 54L, is attached to a vehicle front side end portion
of a vehicle vertical direction intermediate section of a right side door (front side
door, not illustrated in the drawings) of the vehicle. The rear-right facing camera
14 is attached near to a leading end portion of the camera support body 54R. An imaging
optical axis (lens) of the rear-right facing camera 14 is directed toward the rear-right
of the vehicle, and captures images at the rear-right of the vehicle. The camera support
body 54R is also capable of swinging in the vehicle front-rear direction under drive
force of the camera stowing ACT 16 so as to be swung to a stowed position where the
length direction of the camera support body 54R substantially follows an outer side
face of the vehicle, or to a deployed position where the rear-right facing camera
14 captures images at the rear-right of the vehicle.
[0026] Note that in the present exemplary embodiment, the lenses of the rear-left facing
camera 12 and the rear-right facing camera 14 each have a fixed focal point and a
relatively wide view angle. Mechanisms to modify the orientations of the imaging optical
axes are not provided. Thus, in a state in which the camera support body 54L is positioned
in the deployed position, the rear-left facing camera 12 captures images of a relatively
wide, fixed imaging region at the rear-left of the vehicle. In a state in which the
camera support body 54R is positioned in the deployed position, the rear-right facing
camera 14 captures images of a relatively wide, fixed imaging region at the rear-right
of the vehicle.
[0027] The left monitor 18 is provided in a vehicle cabin interior near to a lower end of
a left front pillar. An image (video image) representing the rear-left captured by
the rear-left facing camera 12 is displayed on the left monitor 18 by the electronic
mirror ECU 34. Namely, the left monitor 18 has a function replacing that of a left
outer mirror. An occupant is able to check the situation in a restricted view region
at the rear-left of the vehicle by viewing the image displayed on the left monitor
18.
[0028] The right monitor 20 is provided in the vehicle cabin interior near to a lower end
of a right front pillar. An image (video image) representing the rear-right captured
by the rear-right facing camera 14 is displayed on the right monitor 20 by the electronic
mirror ECU 34. Namely, the right monitor 20 has a function replacing that of a right
outer mirror. The occupant is able to check the situation in a restricted view region
at the rear-right of the vehicle by viewing the image displayed on the right monitor
20.
[0029] A central monitor 56 is provided at a central portion of an instrument panel of the
vehicle. An inner rear view mirror 58 is provided at a position separate from and
at the vehicle upper side of the central monitor 56. In the present exemplary embodiment,
the inner rear view mirror 58 is an optical mirror. The orientation of the mirror
surface of the inner rear view mirror 58 is adjusted so as to reflect a restricted
view region behind the vehicle.
[0030] The operation section 22 is an operation interface disposed toward the vehicle lower
side of a right end of the instrument panel. As illustrated in Fig. 3, the operation
section 22 includes a four-way switch 24 that enables input of an operation to instruct
a movement direction of an image display range of the left monitor 18 or the right
monitor 20. The movement is split into four directions corresponding to the upper,
lower, left, and right directions of the vehicle. More specifically, the four-way
switch 24 includes four switches respectively corresponding to the upper, lower, left,
and right directions, and the respective switches are switched ON by pressing an operation
button of the four-way switch 24 at different locations (namely, on the upper side,
the lower side, the left side, or the right side of the operation button). The occupant
is therefore able to instruct a desired direction out of the four directions by selecting
and pressing a corresponding pressing location on the operation button of the four-way
switch 24.
[0031] The operation section 22 also includes a left selection switch 26 enabling selection
of a display image on the left monitor 18 as an instruction target of the four-way
switch 24, and a right selection switch 28 enabling designation of a display image
on the right monitor 20 as an instruction target of the four-way switch 24. The left
selection switch 26 and the right selection switch 28 are switched between an ON state
and an OFF state each time they are pressed. The operation section 22 also includes
a menu switch 30 enabling instruction of a menu screen display, and a stow/deploy
switch 32 enabling instruction of swinging of the camera support bodies 54L, 54R.
Note that the operation section 22 is an example of an operation section, the four-way
switch 24 is an example of a first operation section, and the left selection switch
26 and the right selection switch 28 are an example of a second operation section.
[0032] As illustrated in Fig. 1, the electronic mirror ECU 34 includes a CPU 36, memory
38, and a storage section 40, which is a non-volatile memory. A surroundings image
display program 42 is stored in the storage section 40. The electronic mirror ECU
34 performs surroundings image display processing, described later, by reading the
surroundings image display program 42 from the storage section 40, expanding the surroundings
image display program 42 in the memory 38, and executing the surroundings image display
program 42 expanded in the memory 38 using the CPU 36.
[0033] Explanation follows regarding operation of the present exemplary embodiment. Each
time the stow/deploy switch 32 of the operation section 22 is operated, the electronic
mirror ECU 34 swings the camera support bodies 54L, 54R to either the stowed position
or the deployed position using the camera stowing ACT 16. When the menu switch 30
is switched ON, the electronic mirror ECU 34 displays a menu screen in which plural
items relating to the electronic outer mirror device 10 are displayed in a selectable
list on the right monitor 20 or the central monitor 56, for example. For example,
the items displayed in the list on the menu screen include brightness adjustment of
the images displayed on the left and right monitors 18, 20. The occupant operates
the four-way switch 24, the left selection switch 26, or the right selection switch
28 to select particular items, instruct adjustment of the image brightness, or the
like. Detailed explanation thereof is omitted herein.
[0034] The electronic mirror ECU 34 performs the surroundings image display processing illustrated
in Fig. 4 while an ignition switch of the vehicle is switched ON, and the camera support
bodies 54L, 54R are positioned in their respective deployed positions. Explanation
follows regarding this surroundings image display processing.
[0035] The image illustrated in Fig. 5 corresponds to the entire range of an example image
captured by the rear-right facing camera 14 (or the rear-left facing camera 12). In
cases in which display of a wide angle image has not been instructed, the electronic
mirror ECU 34 crops an image in a display range corresponding to a standard view angle
from both left and right captured images captured by the cameras 12, 14, and resizes
the cropped images electronically for display over the entire screens of the left
and right monitors 18, 20. Fig. 6 illustrates an example of a display range corresponding
to a standard view angle set with respect to the captured image illustrated in Fig.
5, as framed by white intermittent lines. Fig. 7 illustrates an example of an image
at the standard view angle displayed on the monitor 18 or 20 in a case in which the
display range corresponds to the position illustrated in Fig. 6. Separate display
range positions set with respect to the captured images are stored for the left and
right in the storage section 40.
[0036] At step 100 of the surroundings image display processing, the electronic mirror ECU
34 reads the respective display range positions set for a rear-left captured image
captured by the rear-left facing camera 12 and for a rear-right captured image captured
by the rear-right facing camera 14 from the storage section 40. Note that initial
display range positions may for example be positions corresponding to the respective
centers of the rear-left captured image and the rear-right captured image.
[0037] At step 102, based on the display range position set for the rear-left captured image
read at step 100, the electronic mirror ECU 34 crops the rear-left captured image
to an image corresponding to the inside of the display range when the display range
is disposed at the aforementioned position on the rear-left captured image. The electronic
mirror ECU 34 then electronically resizes the image cropped from the rear-left captured
image to be displayed over the entire screen of the left monitor 18 as a standard
view angle image.
[0038] At step 104, based on the display range position set for the rear-right captured
image read at step 100, the electronic mirror ECU 34 crops the rear-right captured
image to an image corresponding to the inside of the display range when the display
range is disposed at the aforementioned position on the rear-right captured image.
The electronic mirror ECU 34 then electronically resizes the image cropped from the
rear-right captured image to be displayed over the entire screen of the right monitor
20 as a standard view angle image. An example of a standard view angle image displayed
on the monitor 18 or 20 at step 102 or 104 is illustrated in Fig. 7. The view angle
of the standard view angle image is an example of a first view angle.
[0039] At step 106, the electronic mirror ECU 34 determines whether or not the left selection
switch 26 has been switched ON. In cases in which determination is negative at step
106 processing transitions to step 108. At step 108, the electronic mirror ECU 34
determines whether or not the right selection switch 28 has been switched ON. In cases
in which determination is negative at step 108 processing transitions to step 110.
At step 110, the electronic mirror ECU 34 determines whether or not the four-way switch
24 has been operated. In cases in which determination is also negative at step 110
processing returns to step 106. Steps 106, 108, and 110 are then repeated until determination
is affirmative at one out of the steps 106, 108, or 110.
[0040] In a state in which steps 106, 108, and 110 are being repeated, if the left selection
switch 26 is switched ON due to the occupant press operating the left selection switch
26 of the operation section 22, determination is affirmative at step 106 and processing
transitions to step 112. At step 112, the electronic mirror ECU 34 determines whether
or not the four-way switch 24 has been operated. In cases in which determination is
negative at step 112 processing transitions to step 118. At step 118, the electronic
mirror ECU 34 determines whether or not the left selection switch 26 has been switched
OFF, or whether or not the right selection switch 28 has been switched ON. In cases
in which determination is negative at step 118 processing returns to step 112, and
the processing of steps 112 and 118 is repeated until determination is affirmative
at either step.
[0041] In a state in which the left selection switch 26 is switched ON and steps 112, 118
are being repeated, in cases in which any of the switches included in the four-way
switch 24 is switched ON by the occupant performing a press operation at a desired
location on the four-way switch 24 of the operation section 22, determination is affirmative
at step 112 and processing transitions to step 114. Note that an operation condition
of affirmative determination at step 112 is an example of a second operation condition.
At step 114, the electronic mirror ECU 34 moves the position of the display range
set with respect to a rear-left captured image according to the operation of the four-way
switch 24.
[0042] Specifically, in cases in which the switch of the four-way switch 24 corresponding
to the upward direction has been switched ON, as illustrated by the arrow U in Fig.
6, the position of the display range on the rear-left captured image is moved in the
upward direction at a constant speed while the switch remains ON. In cases in which
the switch of the four-way switch 24 corresponding to the downward direction has been
switched ON, as illustrated by the arrow D in Fig. 6, the position of the display
range on the rear-left captured image is moved in the downward direction at a constant
speed while the switch remains ON. In cases in which the switch of the four-way switch
24 corresponding to the left direction has been switched on, as illustrated by the
arrow L in Fig. 6, the position of the display range on the rear-left captured image
is moved in the left direction at a constant speed while the switch remains ON. However,
in the example illustrated in Fig. 6, since the display range is positioned at a left
edge of the rear-left captured image, movement of the display range in the left direction
is cancelled in this example. In cases in which the switch of the four-way switch
24 corresponding to the right direction has been switched ON, as illustrated by the
arrow R in Fig. 6, the position of the display range on the rear-left captured image
is moved in the right direction at a constant speed while the switch remains ON.
[0043] After the position of the display range has been moved in the above manner, the electronic
mirror ECU 34 crops an image corresponding to the display range after being moved
from the rear-left captured image, and electronically resizes the image cropped from
the rear-left captured image to be displayed over the entire screen of the left monitor
18 as a standard view angle image. Next, at step 116, the electronic mirror ECU 34
stores the position of the display range after being moved in the storage section
40, and processing transitions to step 118.
[0044] Thus, while the left selection switch 26 remains in an ON state, each time the four-way
switch 24 is operated, the position of the display range on the rear-left captured
image is moved according to operation of the four-way switch 24, the standard view
angle image displayed on the left monitor 18 is switched according to the movement
of the display range, and the position of the display range with respect to the rear-left
captured image stored in the storage section 40 is updated to the position of the
display range after being moved.
[0045] In a state in which steps 112 and 118 are being repeated, if the left selection switch
26 is switched OFF due to the occupant repeating press operation of the left selection
switch 26, or if the right selection switch 28 is switched ON by the occupant performing
a press operation of the right selection switch 28, determination is affirmative at
step 118, and processing returns to the loop of steps 106, 108, and 110. Note that
if the right selection switch 28 is switched ON, the left selection switch 26 that
was in the ON state is automatically switched OFF.
[0046] In a state in which steps 106, 108, and 110 are being repeated, if the right selection
switch 28 of the operation section 22 is switched ON due to the occupant performing
a press operation of the right selection switch 28, determination is affirmative at
step 108 and processing transitions to step 120. At step 120, the electronic mirror
ECU 34 determines whether or not the four-way switch 24 has been operated. In cases
in which determination is negative at step 120 processing transitions to step 126.
At step 126, the electronic mirror ECU 34 determines whether or not the right selection
switch 28 has been switched OFF, or whether or not the left selection switch 26 has
been switched ON. In cases in which determination is negative at step 126 processing
returns to step 120, and the processing of steps 120 and 126 is repeated until determination
is affirmative at either step.
[0047] In a state in which the right selection switch 28 is switched ON and steps 120, 126
are being repeated, in cases in which any of the switches included in the four-way
switch 24 is switched ON by the occupant performing a press operation of a desired
location on the four-way switch 24 of the operation section 22, determination is affirmative
at step 120 and processing transitions to step 122. Note that an operation condition
of affirmative determination at step 120 is an example of the second operation condition.
At step 122, the electronic mirror ECU 34 moves the position of a display range set
with respect to a rear-right captured image according to operation of the four-way
switch 24, crops an image corresponding to the display range after being moved from
the rear-right captured image, and electronically resizes the image cropped from the
rear-right captured image for display over the entire screen of the right monitor
20 as a standard view angle image. Next, at step 124, the electronic mirror ECU 34
stores the position of the display range after being moved in the storage section
40, and processing transitions to step 126.
[0048] Thus, while the right selection switch 28 remains in an ON state, each time the four-way
switch 24 is operated, the position of the display range on the rear-right captured
image is moved according to operation of the four-way switch 24, the standard view
angle image displayed on the right monitor 20 is switched according to the movement
of the display range, and the position of the display range with respect to the rear-right
captured image stored in the storage section 40 is updated to the position of the
display range after being moved. In a state in which steps 120 and 126 are being repeated,
if the right selection switch 28 is switched OFF, or if the left selection switch
26 is switched ON, determination is affirmative at step 126, and processing returns
to the loop of steps 106, 108, and 110.
[0049] In a state in which steps 106, 108, and 110 are being repeated, in cases in which
any of the switches included in the four-way switch 24 is switched ON by the occupant
performing a press operation of a desired location on the four-way switch 24 of the
operation section 22, determination is affirmative at step 110 and processing transitions
to step 128. Note that an operation condition of affirmative determination at step
110 is an example of a first operation condition.
[0050] At step 128, the electronic mirror ECU 34 electronically resizes the entirety of
the rear-left captured image captured by the rear-left facing camera 12 for display
over the entire screen of the left monitor 18 as a wide angle image, and electronically
resizes the entirety of the rear-right captured image captured by the rear-right facing
camera 14 to be displayed over the entire screen of the right monitor 20 as a wide
angle image. An example of a wide angle image displayed on the monitor 18, 20 at step
128 is illustrated in Fig. 5. By observing the wide angle images displayed on the
monitors 18, 20, the occupant is able to check the situation at the rear-left and
the rear-right of the vehicle, these being restricted view regions, over a comparatively
wide range. Note that the view angle of a wide angle image is an example of a second
view angle.
[0051] At step 130, the electronic mirror ECU 34 determines whether or not the left selection
switch 26 or the right selection switch 28 has been switched ON. In cases in which
determination is negative at step 130 processing transitions to step 132. At step
132, the electronic mirror ECU 34 determines whether or not the four-way switch 24
has been operated. In cases in which determination is negative at step 132 processing
transitions to step 134. At step 134, the electronic mirror ECU 34 determines whether
or not a state in which the vehicle speed detected by the vehicle speed sensor 50
is a predetermined value or greater has continued for a specific duration or longer.
Note that an example of the predetermined value is 30 km/h, and an example of the
specific duration is 15 seconds.
[0052] In cases in which determination is negative at step 132 processing returns to step
130. The processing of steps 130, 132, and 134 is then repeated until determination
is affirmative at any of steps 130, 132, or 134. The wide angle images continue to
be displayed on the left monitor 18 and the right monitor 20 while this is occurring.
[0053] In a state in which steps 130, 132, and 134 are being repeated, in cases in which
the left selection switch 26 or the right selection switch 28 is switched ON, determination
is affirmative at step 130 and processing returns to step 100. In the state in which
steps 130, 132, and 134 are being repeated, in cases in which the four-way switch
24 is operated, determination is affirmative at step 132 and processing returns to
step 100. In the state in which steps 130, 132, and 134 are being repeated, in cases
in which the state in which the vehicle speed is the predetermined value or greater
has continued for the specific duration or longer, determination is affirmative at
step 134 and processing returns to step 100.
[0054] Thus, in any of the above cases, the images displayed on the monitors 18, 20 are
switched from wide angle images to standard view angle images after performing steps
100 to 104. The ranges displayed as the standard view angle images when this is performed
are the same as the display ranges stored in the storage section 40, namely, the display
ranges when the standard view angle images were displayed directly prior to displaying
the wide angle images.
[0055] Thus, in the present exemplary embodiment, different ranges of the vehicle surroundings
are imaged by the cameras 12, 14, and the plural images captured by the cameras 12,
14 are displayed on the monitors 18, 20. The operation section 22 includes the four-way
switch 24 enabling input of operations to instruct the movement direction of the range
of an image to be displayed on the monitor 18 or 20, and the selection switches 26,
28 enabling input of an operation to designate a target image from out of the plural
images. The electronic mirror ECU 34 switches between a mode in which the images displayed
on the monitors 18, 20 are modified under the first operation condition in which the
four-way switch 24 has been operated in a state in which a target image has not been
designated using the selection switches 26, 28, and a mode in which an image displayed
on the monitor 18 or 20 is modified under a second operation condition in which the
four-way switch 24 is operated in a state in which a target image has been designated
using the selection switch 26 or 28.
[0056] The configuration of the operation section 22 is accordingly essentially no different
to that of an existing electric optical mirror device, and differences from existing
electric optical mirror devices in terms of the operation interface are suppressed.
This suppresses any uncertainty felt by an occupant accustomed to the operation of
an existing electric optical mirror device. Thus, the present exemplary embodiment
enables a difference in configuration of the operation section and a difference in
the operation interface in comparison to that of an existing electric optical mirror
device to be suppressed. Moreover, since there is essentially no difference between
the configuration of the operation section 22 and that of an existing electric optical
mirror device, in cases in which either the electronic outer mirror device 10 or an
electric optical mirror device is selectively installed to the same model of vehicle,
an increase in costs arising from differences in the configuration of the operation
section 22 can be suppressed.
[0057] In the present exemplary embodiment, under the first operation condition, the electronic
mirror ECU 34 modifies the respective view angles of the plural images displayed on
the monitors 18, 20, thereby enabling the difference between the operation interface
and that of an existing electric optical mirror device to be further reduced, and
enabling any uncertainty felt by an occupant accustomed to the operation of the existing
electric optical mirror device to be further suppressed.
[0058] In the present exemplary embodiment, under the second operation condition, the electronic
mirror ECU 34 moves the display range of the target image on the monitor 18 or 20,
as designated using the selection switch 26 or 28, in a direction corresponding to
operation of the four-way switch 24. This enables the difference between the operation
interface and that of an existing electric optical mirror device to be further reduced,
thus enabling any uncertainty felt by an occupant accustomed to the operation of the
existing electric optical mirror device to be further suppressed.
[0059] In the present exemplary embodiment, in cases in which the vehicle speed is the predetermined
value or greater in the state in which the wide angle images are being displayed on
the monitors 18, 20, the electronic mirror ECU 34 switches the displays to the standard
view angle images. This increases the size of image regions corresponding to objects
present in the environs of the vehicle in the images displayed on the monitors 18,
20. This makes it easier for an occupant to recognize the presence of these objects,
enabling safety during vehicle travel to be improved.
[0060] In the present exemplary embodiment, the electronic mirror ECU 34 stores in the storage
section 40 the display ranges of images on the monitors 18, 20 for the state in which
standard view angle images are displayed on the monitors 18, 20. When switching display
from the state in which the wide angle images are displayed on the monitors 18, 20
to the standard view angle images, the electronic mirror ECU 34 displays images on
the monitors 18, 20 according to the display ranges stored in the storage section
40. This reduces the likelihood of needing to adjust the display ranges of the standard
view angle images displayed on the monitors 18, 20 when the displays are switched
from the wide angle images to the standard view angle images, thereby enabling ease
of operation to be improved.
[0061] In the mode explained above, a function to modify the orientations of the imaging
optical axes of the rear-left facing camera 12 and the rear-right facing camera 14
is not provided. However, there is no limitation thereto. For example, this function
may be provided to the left and right cameras 12, 14, and the ranges displayed as
images on the monitors 18, 20 may be moved by modifying the orientations of the imaging
optical axes of the cameras 12, 14.
[0062] In the mode explained above, the lenses of the rear-left facing camera 12 and the
rear-right facing camera 14 each have a fixed focal point and a comparatively wide
view angle. However, there is no limitation thereto. For example, the lenses of the
left and right cameras 12, 14 may be zoom lenses, and the view angles of the images
displayed on the monitors 18, 20 may be modified by modifying the magnification of
the zoom lenses.
[0063] In the mode explained above, the image displayed on the left monitor 18 is captured
by the rear-left facing camera 12, and the image displayed on the right monitor 20
is captured by the rear-right facing camera 14. However, there is no limitation thereto.
For example, plural cameras may be provided as cameras imaging at the left side of
the vehicle, and a composite image of the images captured by these cameras may be
displayed on the left monitor 18. Similarly, plural cameras may be provided as cameras
imaging at the right side of the vehicle, and a composite image of the images captured
by these cameras may be displayed on the right monitor 20.
[0064] In the mode explained above, the images captured by the left and right cameras 12,
14 are displayed on the left and right monitors 18, 20. However, there is no limitation
thereto. For example, left and right images captured by the left and right cameras
12, 14 may be displayed on the central monitor 56. Alternatively, the inner rear view
mirror 58 may be configured so as to be capable of displaying images, and the left
and right images may be displayed thereon.
[0065] In the above description, the display range of the standard view angle images displayed
on the left monitor 18 or the right monitor 20 is only moved in cases in which either
the left selection switch 26 or the right selection switch 28 has been switched ON
and the four-way switch 24 has been operated. However, there is no limitation thereto.
For example, reverse-coordinated control, in which the display ranges of the standard
view angle images are moved toward the vehicle lower side to facilitate viewing of
obstacles at the lower side at the side of the vehicle while the vehicle is reversing,
turning-coordinated control, in which the display ranges of the standard view angle
images are moved in coordination with operation of a direction indicator to facilitate
viewing behind the vehicle, or the like may be performed.
[0066] In the mode explained above, the view angles of the images displayed on the monitors
18, 20 are modified between two levels, these being the standard view angle images
and the wide angle images. However, there is no limitation thereto. For example, the
view angles may be modified in three or more plural increments, whereby in a state
in which the left selection switch 26 and the right selection switch 28 are not switched
ON, the view angles of the images are switched to a wider angle each time the switch
of the four-way switch 24 corresponding to the upward direction is switched ON, and
the view angles of the images are switched to a narrower angle each time the switch
of the four-way switch 24 corresponding to the downward direction is switched ON.
[0067] In the mode explained above, the single electronic mirror ECU 34 is provided as the
display controller of the left and right cameras 12, 14 and the left and right monitors
18, 20. However, there is no limitation thereto. For example, a first display controller
controlling the rear-left facing camera 12 and the left monitor 18, and a second display
controller controlling the rear-right facing camera 14 and the right monitor 20 may
be respectively provided, with the first display controller and the second display
controller being configured so as to communicate as required.
1. A vehicle surroundings display device comprising:
a plurality of imaging sections (12, 14) that each image a different region surrounding
a vehicle;
at least one display section (18, 20) that displays a plurality of images captured
by the imaging sections (12, 14);
an operation section (22) including a first operation section (24) enabling input
of an operation to instruct a movement direction of a range to display as an image
on the display section (18, 20), and a second operation section (26, 28) enabling
input of an operation to designate a target image out of the plurality of images;
and
a display controller (34) that is configured to switch between a mode in which the
display controller (34) modifies an image displayed on the display section (18, 20)
under a first operation condition in which the first operation section (24) has been
operated in a state in which the target image has not been designated using the second
operation section (26, 28), and a mode in which the display controller (34) modifies
an image displayed on the display section (18, 20) under a second operation condition
in which the first operation section (24) has been operated in a state in which the
target image has been designated using the second operation section (26, 28).
2. The vehicle surroundings display device of claim 1, wherein, under the first operation
condition, the display controller (34) modifies respective view angles of the plurality
of images displayed on the display section (18, 20).
3. The vehicle surroundings display device of claim 1 or claim 2, wherein, under the
second operation condition, the display controller (34) moves a display range of the
target image designated using the second operation section (26, 28) on the display
section (18, 20) in a direction corresponding to operation of the first operation
section (24).
4. The vehicle surroundings display device of claim 2, wherein the display controller
(34) modifies the view angle between a first view angle that is a standard view angle,
and a second view angle that is a wider angle than the first view angle.
5. The vehicle surroundings display device of claim 4, wherein, in cases in which the
first operation section (24) is operated again or the second operation section (26,
28) has been operated in a state in which an image is being displayed on the display
section (18, 20) at the second view angle, the display controller (34) modifies the
view angle of the image to the first view angle.
6. The vehicle surroundings display device of claim 4, wherein, in cases in which a vehicle
speed of the vehicle is a predetermined value or greater in a state in which an image
is being displayed on the display section (18, 20) at the second view angle, the display
controller (34) modifies the view angle of the image to the first view angle.
7. The vehicle surroundings display device of any one of claim 4 to claim 6, wherein:
in a state in which an image is being displayed on the display section (18, 20) at
the first view angle, the display controller (34) stores a display range for displaying
images on the display section (18, 20) in a storage section (40); and
in cases in which the view angle of an image is modified to the first view angle from
a state in which the image is being displayed on the display section (18, 20) at the
second view angle, the display controller (34) displays an image on the display section
(18, 20) corresponding to the display range stored in the storage section (40).
8. The vehicle surroundings display device of any one of claim 1 to claim 7, wherein
the vehicle surroundings display device is an electronic outer mirror device installed
in the vehicle.